I have been at this for over 24 hours, here is what I have so far.
-I have an Ubuntu Server running version 14.04.2.amd64, called SV-01
-SV-01 has two NICs. ETH1 is for the external network (goes to ...

Looking at the access log I found excessive access from an IP address. I then edit either .htaccess or .conf files to deny access from that IP. I wonder if there is a command or a oneliner that can do ...

I always face problems pinging the base machine whenever I assign statics IPs to VMs.
I also don't understand what gateway IP should I give,to connect to the internet or just to be able ping the Base ...

I have an old modem I was considering repurposing. The first step I thought to do was connect my computer with the modem and try to map the open ports. I found that, upon connecting the device, that ...

I want to route network traffic that comes from one end of ssh tunnel (constructed by ssh dynamic port-forwarding) into one end of VPN tunnel.
Given four linux devices A, B, C and D, for example, I ...

socat TCP-LISTEN:22,fork TCP:192.168.0.15:5900
How can I tell to socat, that port 22 is only trusted from the remote IP address 8.8.8.8, and it should not accept connections from other IP addresses? ...

I'm noob.
I'm trying to install Gentoo from the LiveCD (just for fun as well as for getting better understanding what's going on under the Linux's hood) on my notebook.
I've faced an issue which is ...

This is not a programming question, but a question about NetBSD.
Linux, FreeBSD and OpenBSD have mutually exclusive but similar interfaces to allow binding the local end of a connection to an address ...

We have a server (camera) sending RTSP video packets via UDP. At a customer site it travels over several hops, one of which may be an unreliable WiFi link that drops the odd packet or five. Usually ...

I am making a bastion ssh server. When I use the following rules in its ip tables, I am able to connect to the server just fine:
Inbound Rules
Allow traffic on port 22 from my client's IP
Block all ...

I wanna setup Open VPN on my Pi, but first I wanted to check whether I can setup my modem and router (DD-WRT ; linux-based firmware) to port forward to my Pi and test SSH to it in the first place.
So ...

I've got a raspberry pi set up to send me periodic emails. As it's connected to the internet 24/7, I need IPTables set up properly.
I want to allow incoming SSH and allow emails to send out on port ...

I recently installed Linux Ubuntu 14.04 to my computer. To enable internet connection I needed to change my IP and Gateway address.
I did the following as a root user
# ifconfig eth0 "my ip address ...

I configured my iptables today and ran into some questions i could not resolve yet. So it would be nice, if someone could verify or answer the following to clarify:
Each interface can be configured ...

I invoke from my application dhclient but there is a problem with IP addresses conflicts. If I have other interface with statically set IP address, dhclient does not send DHCPDECLINE when DHCP Server ...

I need to add a subinterface to an existing interface, which is on a VLAN. Furthermore, the subinterface must have it's own MAC address. Through the man pages I found this syntax which works fine on ...

From my production server, I should make several connections (>50) to two different IP addresses. I am trying to load balance among these two IP addresses when making outbound connections so that the ...